Motor thermal protection
The electronic thermal relay in UL-approved frequency
converters has received UL-approval for single motor
protection, as long as parameter 117
Motor thermal
protection
has been set to ETR Trip and parameter
105
Motor current I
VLT,N
, has been programmed for the
rated motor current (can be read from the motor name-
plate).
Earth connection
Since the leakage currents to earth may be higher than
3.5 mA, the frequency converter must always be earth-
ed in accordance with applicable na-tional and local
regulations. In order to ensure good mechanical con-
nection of the earth cable, its cable cross-section must
be at least 10 mm
2
. For added security, an RCD (Re-
sidual Current Device) may be installed. This ensures
that the frequency converter will cut out if the leakage
currents get too high. See RCD instructions MI.66.AX.
02.
Installation of 24 Volt external DC supply
Torque: 0.5 - 0.6 Nm
Screw size: M3
No.
Function
35(-), 36 (+)
24 V External DC supply
(Available with VLT 6152-6602 380-460 V and VLT 6102-6652,
525-600 V only)
24 V external DC supply can be used as low-voltage
supply to the control card and any option cards instal-
led. This enables full operation of the LCP (incl. pa-
rameter setting) without connection to mains. Please
note that a warning of low voltage will be given when
24 V DC has been connected; however, there will be
no tripping. If 24 V external DC supply is connected or
switched on at the same time as the mains supply, a
time of min. 200 msec. must be set in parameter 111,
Start delay
. A pre-fuse of min. 6 Amp, slow-blow, can
be fitted to protect the external 24 V DC supply. The
power consumption is 15-50 W, depending on the load
on the control card.
NB!
Use 24 V DC supply of type PELV to en-
sure correct galvanic isolation (type
PELV) on the control terminals of the fre-
quency converter.
DC bus connection
The DC bus terminal is used for DC back-up, with the
intermediate circuit being supplied from an external
DC source.
Terminal nos.
88, 89
Contact Danfoss if you require further information.
High-voltage relay
The cable for the high-voltage relay must be connec-
ted to terminals 01, 02, 03. The high-voltage relay is
programmed in parameter 323,
Relay 1, out-put.
No. 1
Relay ouput 1
1+3 break, 1+2 make
Max 240 V AC, 2 Amp
Min. 24 V DC 10 mA or
24 V AC, 100 mA
Max Cross-section:
4 mm
2
/10 AWG
Torque:
0.5-0.6
Nm
Screw size:
M3
Control card
All terminals for the control cables are located under
the protective cover of the frequency converter. The
protective cover (see drawing below) can be removed
by means of a pointed object - a screwdriver or similar.
VLT
®
6000 HVAC Series
MG.61.B5.02 - VLT
®
is a registered Danfoss trademark
87
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Содержание VLT 6000 HVAC Series
Страница 31: ...Ordering form VLT 6000 HVAC Series MG 61 B5 02 VLT is a registered Danfoss trademark 31 Introduction to HVAC ...
Страница 63: ...Mechanical dimensions VLT 6000 HVAC Series MG 61 B5 02 VLT is a registered Danfoss trademark 63 Installation ...
Страница 75: ...VLT 6000 HVAC Series MG 61 B5 02 VLT is a registered Danfoss trademark 75 Installation ...
Страница 204: ...VLT 6000 HVAC Series 204 MG 61 B5 02 VLT is a registered Danfoss trademark ...